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What is the problem with MTBE in gasoline?

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Why does gasoline contain MTBE, and what is the problem with it?

How do the streetlights turn on automatically at night?

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On the Flintstones, a small bird sits inside the light and turns it on every night before he goes to bed. In a modern streetlight, a small circuit replaces the bird.

Daisy Chain Quilt Pattern

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Make the daisy chain quilt pattern your next quilt project. Download the freeQuilting pattern at HowStuffWorks.

Fly Away Ladybug! Quilt Block

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The Fly Away Ladybug! quilt block features an image of a ladybug and two leaves. Download the free quilt block only at HowStuffWorks.

Gossamer Wings Quilt Block

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The Gossamer Wings quilt block uses the image of a dragonfly, ideal for a garden-themed quilt. Find the free quilt block download in this article.

How to Play Fan Tan

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Fan Tan is a card game in which the object is to be the first to play off all of your cards. Learn the rules and tips on how to block your opponents.

Garden of Eden Quilt Block

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The Garden of Eden quilt block has a bold, attractive design. Learn to make the block and download the free quilt block on HowStuffWorks.

Chances are, if you've done even the slightest bit of traveling, you've crossed your fair share of bridges. These feats of engineering can span anything from a trickling stream to a raging river. Can you cross the bridge quiz without falling?